The amazing colour-changing Magic Pens by Wham-O are so easy to use and kids have tonnes fun as they change colours like magic! The Colour Change Pens write the colour of the pens barrel, but will magically change to the colour of the cap with a touch of the White Magic Pen.Eraser Pens write the colour of the pen's barrel, but will magically erase with the touch of the Magic White Pen.Magic Pens by Wham-O can be used on any paper and are also great for colouring books too! The kit also includes Magic Stencils and a bonus Blow Pen attachment to provide hours of fun! Washable and non-toxic.Ages 4+.